Video from December 9, 2016
I expected this to be a normal stack train, but then I saw something really strange. It looked like a stack container was balanced precariously on top of some posts. Then I realized that it was on top of an empty container with no sides or roof.
I don't know what this is used for. It can't be for wide loads because it wouldn't fit in trains, ships, etc. If anyone knows what loads it carries, write a comment under the video.